2005 hyundai aceent codes?

ok basically my moms cars is crap to say the least i will never understand how hyundai is able to sell cars when they have as many issues as my moms accent.she took it in to get it smog and i was sure it was going to give some codes it gave,p2400,p0036,p2400,p2405 now the issus is they came out as unknown trouble codes,so how am i spose to fix somthing when its unknown,im hoping theres someone out there who knows what these codes mean it would be a huge help and possible keep me from setting that crap junker on fire thanks for any help you give